Warm dry winds blowing down the east slopes of Rockies are known as

Chinook winds are warm, dry winds that descend the eastern slopes of the Rocky Mountains, causing rapid temperature rises. They form when moist air from the Pacific is forced upward, cools and precipitates on the windward side, then warms adiabatically as it descends the leeward side. Mistral affects France, nor'westers affect Bengal, and foehn is the general European term.